Move over Fat Betty, it's all about Fat Megan now.

"Mad Men" star Jessica Pare stars in a brand new video for Funny or Die, making fun of all those skinny celebs who say they can eat whatever without gaining any weight.

In the video, the 33-year-old Canada native trades in her diet of kale for junk food, stuffing her face with as many cheeseburgers as possible.

VIDEO: See Jon Hamm's Embarrassing '90s Dating Game Appearance

It's nice to see Jessica show off her comedic chops, something we don't see much of from her on the AMC drama.

The final season of "Mad Men" kicks off April 13. Check out the gallery below to see what all the stars look like in real life -- for some, it's very different than their TV alter-egos!


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